<!DOCTYPE html>
<html>
  <head>
    <title>定位</title>
    <style>
      .top {
        height: 60px;
        background-color: aqua;
        position: fixed;
        left: 0;
        right: 0;
        z-index: 1;
      }
      body {
        margin: 0;
        padding: 0;
      }
      .left {
        width: 300px;
        background-color: yellowgreen;
        position: absolute;
        left: 0;
        top: 60px;
        bottom: 0;
      }
      .right {
        background-color: aliceblue;
        position: absolute;
        left: 300px;
        top: 60px;
        bottom: 0;
        right: 0;
      }
      .new {
        font-size: 14px;
        color: #000;
      }
      p {
        padding: 0;
        margin: 0;
      }
    </style>
  </head>
  <body>
    <div class="top"></div>
    <div class="con">
      <div class="left"></div>
      <div class="right"></div>
    </div>
  </body>
</html>
